We also showed that KIR2DL3/KIR2DL3/C1/C1 is strongly increased in BL patients over the contacts, but previous studies in Southern Brazil [20] and the Mid-West [19] did not show a significant association between KIR2DL3/KIR2DL3/C1/C1 and the susceptibility of BL. The gene discussed is KIR2DL3; the disease is Burkitt lymphoma.